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Just thought I would voice my experience with using the SI and water balance to prevent calcium scale. Where I live in Southern California, pools can easily build to a CA hardness of 300-400ppm. I have read in more than one training certification manual that by keeping pH, TA in range (pH...

I have read several papers/discussions on calculating the saturation index. All of them used examples, and all of them chose example test numbers that matched exactly with a number on the table. As you know, the table listings have wide gaps between the number ranges listed. For temperature it...

I have seen a couple of unclarified references that indicate that there is some issue with certain CYA levels and the use of cartridge filters. Can someone explain the issue in some detail? I run a Jandy paper cartridge filter. It is unclear to me what if anything the CYA level has to do with...

Hello everyone. I am new to the forum, but have found it very informative already. I'll try to do an intro at another time. Here is my haunting question. What do I need to do to increase my ORP value? Depending on whether you subscribe to the saturation index range of -0.5 - +0.5, or if you...